US12444790B2 - Electricity storage device - Google Patents

Electricity storage device

Info

Publication number
US12444790B2
US12444790B2 US17/904,193 US202117904193A US12444790B2 US 12444790 B2 US12444790 B2 US 12444790B2 US 202117904193 A US202117904193 A US 202117904193A US 12444790 B2 US12444790 B2 US 12444790B2
Authority
US
United States
Prior art keywords
gasket
electrode
crimp
opening rim
case
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US17/904,193
Other languages
English (en)
Other versions
US20230065382A1 (en
Inventor
Shinya Geshi
Yoshiyuki Okamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. reassignment PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GESHI, SHINYA, OKAMURA, YOSHIYUKI
Publication of US20230065382A1 publication Critical patent/US20230065382A1/en
Application granted granted Critical
Publication of US12444790B2 publication Critical patent/US12444790B2/en
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/08—Housing; Encapsulation
    • H01G9/10—Sealing, e.g. of lead-in wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H01G11/80—Gaskets; Sealings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/10—Housing; Encapsulation
    • H01G2/103—Sealings, e.g. for lead-in wires; Covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/167—Lids or covers characterised by the methods of assembling casings with lids by crimping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/15—Solid electrolytic capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present disclosure relates to an electricity storage device.
  • an electricity storage device includes a case accommodating therein an electrode group including a first electrode and a second electrode and having an opening, and a sealing body covering the opening of the case.
  • the first electrode is electrically connected to the case
  • the second electrode is provided on the sealing body and connected to a terminal electrically insulated from the case.
  • a first collector member electrically connected to the first electrode and a second collector member electrically connected to the second electrode are preferably arranged toward the opening of the electricity storage device.
  • the first collector member is preferably welded onto a rim of the opening of the case and the second collector member is preferably welded onto a terminal of the sealing body.
  • a rim of the opening of the case is crimped to an outer periphery of a sealing lid via the gasket. Therefore, the rim of the opening is pressed onto the gasket and securely contacts the gasket.
  • the gasket may deteriorate due to heat at the welding. Upon deteriorating, the gasket may cause a sealing property achieved by crimping to degrade.
  • An object of the present disclosure is to suppress deterioration of a gasket provided in a sealing body of an electricity storage device.
  • An electricity storage device in accordance with one aspect of the present disclosure includes: an electrode group including first and second electrodes; a case accommodating the electrode group therein, the case having an opening provided therein; and a sealing body covering the opening of the case.
  • the case includes a tubular part, a curved part connected to one end of the tubular part, and a bottom part closing another end of the tubular part.
  • the curved part includes an opening rim, a crimp part connected to the opening rim, and a groove part connected to the crimp part, the crimp part being located outward from the opening rim along a radial direction of the tubular part, the groove part being recessed to protrude inward in the radial direction of the tubular part and having an annular shape.
  • the sealing body includes: a sealing plate having conductivity; and a gasket having electric insulation, the gasket being compressed between the sealing plate and a portion of the crimp part facing the groove part and between the sealing plate and an inner surface of the groove part.
  • the case is electrically connected to the first electrode.
  • the sealing plate is electrically connected to the second electrode.
  • the opening rim does not contact the gasket.
  • a collector member can be bonded onto a portion of the crimp part of the case which does not contact the gasket, providing an electricity storage device that suppresses deterioration of the gasket in the sealing body.
  • FIG. 1 is a sectional view of an electricity storage device in accordance with an exemplary embodiment of the present disclosure.
  • FIG. 2 is a sectional view of the electricity storage device shown in FIG. 1 for illustrating a structure before processing a case of the electricity storage device.
  • FIG. 3 illustrates a thermal impact on a gasket provided in a sealing body.
  • FIG. 4 A is a first step of a manufacturing process of the electricity storage device in accordance with the exemplary embodiment of the present disclosure.
  • FIG. 4 B is a second step of the manufacturing process.
  • FIG. 4 C is a third step of the manufacturing process.
  • FIG. 4 D is a fourth step of the manufacturing process.
  • FIG. 4 E is a fifth step of the manufacturing process.
  • FIG. 4 F is a sixth step of the manufacturing process.
  • FIG. 4 G is a seventh step of the manufacturing process.
  • FIG. 4 H is an eighth step of the manufacturing process.
  • FIG. 4 I is a ninth step of the manufacturing process.
  • FIG. 4 J is a tenth step of the manufacturing process.
  • An electricity storage device in accordance with one aspect of the present disclosure includes: an electrode group including a first electrode and a second electrode; a case accommodating the electrode group therein, the case having an opening provided therein; and a sealing body covering the opening of the case.
  • the case includes a tubular part, a curved part connected to one end of the tubular part, and a bottom part closing another end of the tubular part.
  • the curved part includes an opening rim, a crimp part connected to the opening rim, and a groove part connected to the crimp part, the crimp part being located outward from the opening rim along a radial direction of the tubular part, the groove part being recessed to protrude inward in the radial direction of the tubular part and having an annular shape.
  • the sealing body includes: a sealing plate having conductivity; and a gasket having electric insulation, the gasket being compressed between the sealing plate and a portion of the crimp part facing the groove part and between the sealing plate and an inner surface of the groove part.
  • the case is electrically connected to the first electrode.
  • the sealing plate is electrically connected to the second electrode.
  • the opening rim does not contact the gasket.
  • the curved part may include a step at a boundary between the opening rim and the crimp part, such that a distance D 1 between the opening rim and the groove part in an axial direction of the tubular part is larger than a distance D 2 between the crimp part and the groove part in the axial direction.
  • Distance D 1 is the shortest distance between the opening rim and the groove part in the axial direction.
  • Distance D 2 is the shortest distance between the crimp part and the groove part in the axial direction.
  • a height of the groove part that constitutes a reference of D 1 and D 2 is a height of the groove part at the deepest point of the groove part (which is closest to an axis of the tubular part). The heat of welding is hardly transferred to the gasket due to the relation of D 1 >D 2 , and therefore the deterioration of the gasket can be further suppressed.
  • Types of the electricity storage device are not particularly limited, and include primary batteries, rechargeable batteries, lithium ion capacitors, electric double layer capacitors, and solid electrolyte capacitors.
  • nonaqueous electrolyte capacitors including total solid batteries
  • lithium ion rechargeable batteries that have high energy density are preferably applicable.
  • FIGS. 4 A to 4 J illustrate first to tenth steps of a manufacturing process of the electricity storage device.
  • each diagram illustrates case 110 , sealing plate 131 , gasket 133 , and outer shapes of predetermined dies, but other components are generally omitted from illustration.
  • electrode group 120 a precursor (case precursor 110 X) of case 110 , and sealing body 130 are prepared. Electrode group 120 is accommodated in case precursor 110 X, and internal insulating plate 140 is disposed. Then, a lead (not illustrated) led out from the first electrode is electrically connected to case 110 , and lead 122 led out from the second electrode is electrically connected to the inner surface of sealing plate 131 ( FIG. 4 A ). Then, groove part 1123 having the annular shape is formed in case precursor 110 X at a position which is slightly above internal insulating plate 140 toward opening 101 .
  • Case precursor 110 X includes tubular part 111 having a cylindrical shape, curved part 112 connected to one end of tubular part 111 , and bottom part 113 closing another end of tubular part 111 (see FIG. 2 ).
  • Curved part 112 includes crimp region 1122 X connected to opening rim 1121 and groove part 1123 connected to crimp region 1122 X.
  • Groove part 1123 has an annular shape.
  • Opening rim 1121 includes first bending portion 112 A that expands a diameter of opening 101 outward along the radial direction of tubular part 111 and second bending portion 112 B that returns the diameter of opening 101 inward along the radial direction of tubular part 111 .
  • Sealing body 130 includes sealing plate 131 and gasket 133 .
  • Sealing plate 131 has a disk shape.
  • Gasket 133 includes wall 1331 having a tubular shape and annular base part 1332 having an inner flange shape supporting an inner surface of a periphery 131 S of sealing plate 131 , thus having a tubular shape.
  • first die 510 including annular protrusion 511 on an inner peripheral surface of the die is fitted into groove part 1123 from outside along the radial direction of tubular part 111 .
  • annular second die 520 is pressed onto the outer surface of sealing plate 131 to press sealing plate 131 along the axial direction of tubular part 111 ( FIG. 4 B ). This step allows sealing body 130 to be supported on groove part 1123 .
  • third die 530 that is rotatable contacts the outer surface of opening rim 1121 ( FIG. 4 C ).
  • Third die 530 has a tapered surface with plural steps in a circumferential surface of the third die such that a diameter of the case gradually decreases from opening 101 toward bottom part 113 along the axial direction of tubular part 111 .
  • opening rim 1121 is pushed in from the outside to inside in the radial direction to bend opening rim 1121 inward ( FIG. 4 D ).
  • annular fourth die 540 contacts crimp region 1122 X ( FIG. 4 E ).
  • Crimp region 1122 X is located between first bending portion 112 A and groove part 1123 in curved part 112 , and is to be crimp part 1122 .
  • Fourth die 540 has a tubular concave surface configured to contact crimp region 1122 X. An inner diameter of the concave surface decreases toward a portion of the die configured to contact first bending portion 112 A.
  • Crimp region 1122 X, the periphery 131 S of sealing plate 131 , and gasket 133 are arranged between this concave surface and annular protrusion 511 of first die 510 .
  • fourth die 540 is pressed onto the outer surface of crimp region 1122 X to press crimp region 1122 X together with gasket 133 along the axial direction of tubular part 111 between fourth die 540 and annular protrusion 511 of first die 510 ( FIG. 4 F ).
  • fifth die 550 having a concave surface with radius of curvature smaller than the concave surface of fourth die 540 is prepared.
  • the radius of curvature is defined as a minimum radius of curvature of a concave surface of the die provided by cutting the die along a plane including the axis of the tubular part ( FIG. 4 G ).
  • fifth die 550 is strongly pressed onto the outer surface of crimp region 1122 X to further press crimp region 1122 X together with gasket 133 along the axial direction of tubular part 111 between fifth die 550 and annular protrusion 511 of first die 510 ( FIG. 4 H ).
  • the concave surface of fifth die 550 presses crimp region 1122 X along the axial direction to just contacting opening rim 1121 . Therefore, almost no stress is applied to opening rim 1121 .
  • crimp region 1122 X receives a pressing force from the concave surface of fifth die 550 , and strongly compresses gasket 133 More specifically, gasket 133 is compressed between sealing plate 131 and crimp part 1122 (particularly a portion of the gasket facing groove part 1123 of crimp part 1122 ) and between sealing plate 131 and the inner surface of groove part 1123 .
  • First bending portion 112 A bites gasket 133 .
  • first die 510 is removed away from groove part 1123 , and a circumferential surface of tubular part 111 is fixed by tubular sixth die 560 having an inner circumferential surface facing the circumferential surface of tubular part 111 .
  • a pressing surface of annular seventh die 570 contacts, along the axial direction, crimp part 1122 formed by previous steps ( FIG. 4 I )
  • seventh die 570 further strongly presses crimp part 1122 along the axial direction ( FIG. 4 J ). As a result, groove part 1123 is compressed along the axial direction to increase sealing property of crimp part 1122 .
  • the electricity storage device is effectively applicable, in particular, to a power source of vehicles such as hybrid vehicles and electric vehicles.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
US17/904,193 2020-02-28 2021-02-19 Electricity storage device Active 2042-09-14 US12444790B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2020-034473 2020-02-28
JP2020034473 2020-02-28
PCT/JP2021/006495 WO2021172235A1 (ja) 2020-02-28 2021-02-19 蓄電デバイス

Publications (2)

Publication Number Publication Date
US20230065382A1 US20230065382A1 (en) 2023-03-02
US12444790B2 true US12444790B2 (en) 2025-10-14

Family

ID=77489965

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/904,193 Active 2042-09-14 US12444790B2 (en) 2020-02-28 2021-02-19 Electricity storage device

Country Status (5)

Country Link
US (1) US12444790B2 (de)
EP (1) EP4113706B1 (de)
JP (1) JP7706077B2 (de)
CN (1) CN114846677A (de)
WO (1) WO2021172235A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115298884B (zh) * 2020-03-25 2025-01-14 松下新能源株式会社 圆筒形电池
JP2024524061A (ja) * 2021-12-15 2024-07-05 エルジー エナジー ソリューション リミテッド 二次電池およびこれを含む電池モジュール
US20260088400A1 (en) * 2022-09-30 2026-03-26 Panasonic Intellectual Property Management Co., Ltd. Power storage device
EP4354606A1 (de) * 2022-10-11 2024-04-17 Samsung SDI Co., Ltd. Sekundärbatterie und verfahren zur herstellung davon
WO2026071084A1 (ja) * 2024-09-27 2026-04-02 サン電子工業株式会社 コンデンサと、その製造方法

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0992236A (ja) 1995-09-27 1997-04-04 Sanyo Electric Co Ltd 電池及びその製造方法
JP2000149918A (ja) 1998-11-13 2000-05-30 Matsushita Electric Ind Co Ltd 二次電池
EP1026761A1 (de) 1998-08-25 2000-08-09 Matsushita Electric Industrial Co., Ltd. Sekundärbatterie
JP2001313011A (ja) 2000-05-02 2001-11-09 Ngk Insulators Ltd リチウム二次電池
JP2002008602A (ja) 2000-06-19 2002-01-11 Ngk Insulators Ltd リチウム二次電池
JP2011060644A (ja) 2009-09-11 2011-03-24 Toyota Motor Corp 密閉型電池およびその製造方法
US20110177368A1 (en) 2010-06-22 2011-07-21 Ford Global Technologies, Llc Voltage Detection In A Battery
WO2016157749A1 (ja) 2015-03-27 2016-10-06 三洋電機株式会社 円筒形電池
WO2019074199A1 (ko) 2017-10-11 2019-04-18 삼성에스디아이(주) 이차 전지
WO2019194055A1 (ja) 2018-04-06 2019-10-10 パナソニック株式会社 電池
WO2019244392A1 (ja) 2018-06-22 2019-12-26 パナソニックＩｐマネジメント株式会社 電池モジュール

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003063268A1 (fr) * 2002-01-21 2003-07-31 Fdk Corporation Joint d'etancheite pour pile alcaline
KR102468469B1 (ko) * 2016-03-29 2022-11-21 비나텍주식회사 액시얼 타입의 전기화학 에너지 저장장치
CN107528013A (zh) * 2017-08-21 2017-12-29 力神电池（苏州）有限公司 一种具有防锈功能的圆型锂离子电池及其防锈处理设备

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0992236A (ja) 1995-09-27 1997-04-04 Sanyo Electric Co Ltd 電池及びその製造方法
EP1026761A1 (de) 1998-08-25 2000-08-09 Matsushita Electric Industrial Co., Ltd. Sekundärbatterie
US6524739B1 (en) 1998-08-25 2003-02-25 Matsushita Electric Industrial Co., Ltd. Secondary battery
JP2000149918A (ja) 1998-11-13 2000-05-30 Matsushita Electric Ind Co Ltd 二次電池
JP2001313011A (ja) 2000-05-02 2001-11-09 Ngk Insulators Ltd リチウム二次電池
JP2002008602A (ja) 2000-06-19 2002-01-11 Ngk Insulators Ltd リチウム二次電池
JP2011060644A (ja) 2009-09-11 2011-03-24 Toyota Motor Corp 密閉型電池およびその製造方法
US20110177368A1 (en) 2010-06-22 2011-07-21 Ford Global Technologies, Llc Voltage Detection In A Battery
WO2016157749A1 (ja) 2015-03-27 2016-10-06 三洋電機株式会社 円筒形電池
US20180047973A1 (en) 2015-03-27 2018-02-15 Sanyo Electric Co., Ltd. Cylindrical batteries
WO2019074199A1 (ko) 2017-10-11 2019-04-18 삼성에스디아이(주) 이차 전지
US20200358048A1 (en) 2017-10-11 2020-11-12 Samsung Sdi Co., Ltd. Secondary battery
WO2019194055A1 (ja) 2018-04-06 2019-10-10 パナソニック株式会社 電池
US20210175568A1 (en) 2018-04-06 2021-06-10 Panasonic Corporation Battery
WO2019244392A1 (ja) 2018-06-22 2019-12-26 パナソニックＩｐマネジメント株式会社 電池モジュール
US20210257704A1 (en) 2018-06-22 2021-08-19 Panasonic Intellectual Property Management Co., Ltd. Cell module

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
English Translation of Chinese Office Action dated Feb. 29, 2024 for the related Chinese Patent Application No. 202180007174.9.
International Search Report of PCT application No. PCT/JP2021/006495 dated Apr. 27, 2021.
The EPC Office Action dated Aug. 2, 2023 for the related European Patent Application No. 21759815.0.
The Indian Office Action dated Jan. 20, 2023 for the related Indian Patent Application No. 202247053748.

Also Published As

Publication number Publication date
JP7706077B2 (ja) 2025-07-11
JPWO2021172235A1 (de) 2021-09-02
EP4113706A1 (de) 2023-01-04
EP4113706B1 (de) 2026-04-15
US20230065382A1 (en) 2023-03-02
CN114846677A (zh) 2022-08-02
EP4113706A4 (de) 2023-08-30
WO2021172235A1 (ja) 2021-09-02

Similar Documents

Publication Publication Date Title
US12444790B2 (en) Electricity storage device
US20230012596A1 (en) Secondary battery and battery module
CN113853702B (zh) 二次电池
US7842416B2 (en) Rechargeable battery having a cap assembly
EP4191782A1 (de) Zylindrische sekundärbatterie
US12368199B2 (en) Power storage device
US10181596B2 (en) Secondary Battery
US20110305943A1 (en) Secondary battery and method for fabricating the same
CN117099256A (zh) 二次电池
EP4372857A2 (de) Zylindrische sekundärbatterie
US20250246787A1 (en) Secondary battery
JP6094460B2 (ja) 蓄電装置の製造方法
US20210175566A1 (en) Battery
JP7780762B2 (ja) 蓄電装置および蓄電装置の製造方法
EP4113557B1 (de) Stromspeichervorrichtung
US20260074328A1 (en) Secondary battery, secondary battery crimping device, and crimping method using the same
KR20260049920A (ko) 이차 전지 및 이차 전지의 제조 방법
CN119315074A (zh) 圆柱形二次电池和制造圆柱形二次电池的方法
CN118825426A (zh) 二次电池
CN118825425A (zh) 二次电池
JP2006286295A (ja) 円筒形電池

Legal Events

Date Code Title Description
FEPP Fee payment procedure

Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

AS Assignment

Owner name: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GESHI, SHINYA;OKAMURA, YOSHIYUKI;SIGNING DATES FROM 20220727 TO 20220728;REEL/FRAME:061621/0524

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: ALLOWED -- NOTICE OF ALLOWANCE NOT YET MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: NOTICE OF ALLOWANCE MAILED -- APPLICATION RECEIVED IN OFFICE OF PUBLICATIONS

STPP Information on status: patent application and granting procedure in general

Free format text: NOTICE OF ALLOWANCE MAILED -- APPLICATION RECEIVED IN OFFICE OF PUBLICATIONS

STPP Information on status: patent application and granting procedure in general

Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT RECEIVED

STPP Information on status: patent application and granting procedure in general

Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT VERIFIED

STCF Information on status: patent grant

Free format text: PATENTED CASE